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Differences What are the advantages of each

Front view of Intel Xeon E5-2689

Reasons to consider the
Intel Xeon E5-2689

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Much more l3 cache 20 MB vs 10 MB 2x more l3 cache; more data can be stored in the l3 cache for quick access later
Much more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
More cores 8 vs 4 Twice as many cores; run more applications at once
More threads 16 vs 8 Twice as many threads
Lower typical power consumption 93.44W vs 105.63W More than 10% lower typical power consumption
Lower annual commercial energy cost 100.74 $/year vs 113.88 $/year More than 10% lower annual commercial energy cost
Lower annual home energy cost 27.7 $/year vs 31.32 $/year More than 10% lower annual home energy cost
Front view of Intel Xeon E5-2643

Reasons to consider the
Intel Xeon E5-2643

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Much higher clock speed 3.3 GHz vs 2.6 GHz More than 25% higher clock speed

Benchmarks Real world tests of Xeon E5-2689 vs E5-2643

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5-2689
36,294
Xeon E5-2643
12,252

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5-2689
2,360,000 MB/s
Xeon E5-2643
2,195,000 MB/s

PassMark Data courtesy Passmark

Xeon E5-2689
19,521
Xeon E5-2643
8,479

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E5-2689  vs
E5-2643 
Clock speed 2.6 GHz 3.3 GHz
Cores Octa core Quad core
Socket type
LGA 2011

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

details

Xeon E5-2689  vs
E5-2643 
Threads 16 8
L2 cache 2 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 20 MB 10 MB
L3 cache per core 2.5 MB/core 2.5 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 2

power consumption

TDP 115W 130W
Annual home energy cost 27.7 $/year 31.32 $/year
Annual commercial energy cost 100.74 $/year 113.88 $/year
Performance per watt 10.97 pt/W 7.41 pt/W
Typical power consumption 93.44W 105.63W

bus

Architecture QPI QPI
Number of links 2 2
Data rate 64,000 MB/s 64,000 MB/s
Transfer rate 8,000 MT/s 8,000 MT/s
Clock speed 4,000 MHz 4,000 MHz
Intel Xeon E5-2689
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Intel Xeon E5-2643
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